Rotary engine.



No- 828.712. PATEETBB 3 3%. 14, 1905 H. I. CALL. RGTARY RIGINE.

AL1QLTEGH FILED JULY 19, 1905.

2 SHEETS-SHEET 1.

I ENTOR N0. 828,712. PATBMBD AUG.14, 1906.

, i. I. CALL.

ROTARY ENGINE.

AFPLIUATIOH TILED 3131339. 1905.

2 SHEETS-833B! 2.

UNITED STATES PATENT OFFICE. HUBER? r. CALL, or sriiaxliina, wisiimimim,ASSIGNOR TO CRESCENT KUTARY ENGINE COMPANY, or SPOKANE, WASHINGTON, ACORPO- RATION ()F WASHiNGTON.

ROTARY ENGINE No. 828,712. Specification of Letters Patent. PatentedAug. 14, i906, Applicatien filed July 19, 1305. Serial H- 270.396.

To all wlwm it may concern: 1 equal, semiiunular steam-spaces betweenthe Be it known that I, HUBERT i CALL, 2, eiti said drum and cylinder,said cylinder having 5 5 zen of the United Suites, residing at Spskane,peripheral steam admission and exhaust in the county of Spakane andState Gf Washpassages nr ports and said drum having be 5 ington, havein'ventnd new and useful lmtwesnits opgmsitn segmental mrtions and itsmovements in Rutary Engines, m" which axis twn r'rescentic PlSiZOH-)lade gmnves, the following is a speciiinatiun. inm which iilmlinearly-curvmi sliding pistnn 60 The abject of my invention is ingirevide a. bliiries 9r vanes are so titted that when the rotary engineof a type that empinys a prindrum is minted the respective ends of the10 uiple of working the steam axpiinsively with 'rsspsni-iva slidingblades will be alternately aconomy and in which the steam enters theprojected inwardly and outwardly under the cylinder on both sides at thesame time and cnntrgi 0f the sylinder-wnlls with whisk they 6 5 frompoints opposite each other, the steam are in confsici at each end,tin-relay forming issuing from one 0f the inlets passing upsteanrtightpartitions that move rutatably wardly, whiie that entering from the 0p0- in the swam-wanes referred L0 in form vasite inlet passingdow'mi'ardly, thereby 1m riabiazstea-m receiving and clisclnirgingspauvsparting by an opposite cycle flow a confirmtherein in which tinpres-slur Uf steam is ex- 70 ous' rotary HiGidGil m the ruiarv drum anderzeri GT1 lane side and (Xhlillstfli 0n tlw ntiiei' shaft with theexertion of equal average and 0f iilze biacles Lu give aQlflltiiliirflif ruuiry H10- double pawer and in a manner in obtain alion in the rotary piston and its shaft, While dynamia and i'nechanicalbaiimce tlmi eiimithe said blarin pirsmit eilvuiive pistmmrics natiesthe fi'istion and strains i'iccasinnrl i y that are limitvfl onlyhyiiicir width prujr c- 75 taking of steam on one side only. tion, andthe sectional arm of the st-emn- A further object of my invention is itspruspaces through which iiie y travel (luring 2 5 vide a. rQlzary engineof the almve-melitioned 94ml: lzaifwnvnlntinn.

type which increases its powrsr {iill'i (iimiwTin?inveniiunfm't-iwrmriaiiiisinproviding lshes friction and VliH'ai-IOHby avoiding (learifur the pcriplwml ZHlJillSSlOii 0f strain timing 80centers. ciripnsitelgwlmposerl opposing parts in {lu- Another object ofmy invention in in pg'n iiireii cyiinder, each (if whirl; arr arrangedin vide an engine of a rotary typn which is (23" e'pen rnlaiiinn,reslnrctivniy' iii-i it. :zzljau-mit pabie of having its motiunffivf'fiijti in riiree- Sififiiibt-XPQCH {or division m ulnar ncirculation by means of a rvvnrsiilile \ttlo'i cuntrnl tion 0! .stuiunin ilw slime direction as the 85 that. is simple in fNHlSU'UUilGE'; andarrange sliding pistnn-liiiiiie rfivnlvns past the steam meat. mlmissianparts and the provision for the ex- A still further ulijrct :if myinventirin is to haust of steam iron: tlurvspi-l-iivn steam -pr0virie,inarlrliiiun in the primaryexhaustsplices 0r iiivisiun by uppnsilulyilspusmi openings, supplomi-nmry or FLUXlllfi. Y ex GlltlQiL-Pfii'ifi'msiiiunoil at n. pninl. intvrmnilL 9o haust connections arranged insuuli Pia initial: at? of til? stegim-aalmissiun gmris when the to theprimary minimal-opening and the sliding pistnirishiiins riwulw past thesaid 40 steam-spawns tn obtain a cunt-muons ex exhaust-parts! hit-St,and thereby more oll'mztuaily prevent The imeriiim inrfliwr inusisis inpr0ri4lany back pressure. ing two SPiS of miniisHinn-pnris thatconnnzrt, 5

k A still further object (if my inventiun is to rcsg'iiirtively, {Lilaim npprr uml lower poi-{inns provide a mcthud and means of Running ofthe cylinder with tlw iuljnmnt ends nf ihn stpmn-tighl; joints with theleast pussilil a steam-spams, mi l silt being g'bvcrnorl lay a friction.common visivn, and means for connecting the My invention consists,rimarily,nfnuylinsaid valve, whereby they may be sin1ultane 'ioc dricalpiston or rotary (ii-um mounted an a uusly actuated to establish ormitoil' (mi-innushaft, the same being arranged uunuunlricnieatinn vi theopposing ports of each set with ally within and incluseri by a fixeduylinilor the uppositn stemmspace of the cylinder to havlnamass-sciatica ofiinequal riinuwter L0 tillllilifl -11 reversal ofmotion of the piston in p rovi e, in conjunction with the stnmn stopseitliur desired direutiinn or the stoppage 0f the x05 orabutmentatherein, twnnmmfiiL0ly4iispnse l same, and the further provision andconnection with the respective steam-spaces for the exhaust of steamtherefrom at a point intermediate of said admissiom )orts, the samecomprising the disposition oi two sets of exhaust-ports arranged atdiamdtrically op 0- site points in the periphery of the cylinder, eachset being governed by a common valve that is o eratively connected tothe firstmentionei valvii-connecting means.

The invention further consists in providing an auxiliary exhaustconnection between the dead admission-passage of each sct ofsteamadmission assagcs and the active exhaustpassages 0 each sctthcreof, which connection is under the control of the governingvalve ofthe adjacent steam-admission ports.

The invention also consists in certain other novel features in theconstruction and arran ement of parts, all as hereiriafter described,and specifically set forth in the appended claims.

Referring to the accompanying drawings, which form a part of thisspecification, Fig- 'ures 1 and 2 represent, respectively, an end and alongitudinal elevation of a complete engine constructed in accordancewith the invention. Fig. 3 shows a sectional side elevation of theengine. Fig. 4 is an enlarged view of a fragmentary end portion of oneof the sliding piston-blades employed in the engine. Fig. 5 is afragn'ientary sectional view of the upper end portion of the cylinderwith its at tached head.

Like characters indicate corresponding parts in the several figures.

In order to carry out the several features of the invention and tofurnish a means for 'the conversion of the motive power, there isprovided a short thick cylinder 6, that is incloscd at each end by ahead 7, having on its inner face a centrally-armnged annular rccess 8,the said cylinder being mounted at a suitable height upon the standardsor pedestals 9.

The. interior of the cylinder is elliptical in cross-section, the minorarcs thereof at the top and bottom portions being composed ofeighty-degree curves, while the respective -longitudinally-extendinginterior side walls thereof are extended from the points 1U, 11, '12,and 13 in parabolic curves, as shown in Fig. 3, to form the. ma or arcsof the ellipsis.

14 represents the axially-arranged longitu dinally extending shaft,which is rotatably m'ounted'in large journal-hearings 15, that main turnsupported within the hollow trunnions 16, that project axially from thercpe'ctive' heads 7 of the cylinder.

The shaft 14 extends outwardly beyond the respective cylinder-heads andtheir projecting trunnions a sull'icicnt distance to provide for themounting and support of a pulley ]7 at one end and a fly-wheel 18 at itsopposite end.

Mounted concentrically within the fixed tea s cylinder upon the shaft 14is a rotary piston the head 7-a construction and arrangement 5 thatserves the twofold purpose of providing a steam-abutment and astructural extension of the drum that admits of the formation of thepeculiar-shaped slots therein in a manner to be hereinafter referred toand described.

The rotary drum, thus mounted within a cylinder having a bore of theelliptical crosssection described, provides between the P0- riphery ofsaid drum and the interior walls of said cylinder oppositely-disposedequal-sized crescent-shaped steam spaces or divisions H) and 19, thatare separated by steam-almiment formed by the contour and the closespaced relationship of the up ier and lower inner walls of the cylinderam the re volvingdrum periphery, and the resilient bearing projectionsextending from the walls of the cylinder in vertical alinemcnt, thatcontact with said periphery, as shown at X, form a dividing-line betweensaid steam-spaces.

The rotary piston thus coiistructed and mounted is provided within theconfines of its periphery between its op jiositc segmental portions 20and 2t) and the central portion 21 with curvilinearpiston-bladc-recciving slots 22, which extend crescent-lil c betweentheir peripheral terminations.

lnordcr that the formation of the slots 22 within the rotary drum maynot destroy or weaken the structural union of the segmental portions 20and 20' with its central portion 21 the said slots flare not extendedlongit udinally to the full length of the drum, but terminate at a pointindicated by dotted line 23 in Fig. 5, near the respective ends of therotin-y drum,

Within the slots 22 thus formed are mounted for veiled reciprocation twosimilar coi' perating sliding; piston blades or vanes 24 and-.24, thatare each longitudinally curved to form with the curvilinear planespresent ed by the said slots 22 and that are each of a length to projecttheir ends beyond the pcriphcral slot terminations into contact in allposit ions with the inner peripheralwall ol' the cylinder as they arerotated, thereby forminp at four equidistant ointson. the periphery ofthe drum amovablb peripheral portion the reciprocal movements of whichare obtained by the peripheral contact of their respective ends, w iichby a self-contained cam-like motioli alternately projects the heads ofeach inwardl and outwardly in the direction of the radii of said rotarydrum and in radial ahneinent'with the opposite end of the oppolls sitereciprocating Piston-blade, thereby fermi ing movable stenm-ebutmentsthat cenform themselves t0 the irregular path of travel and presenteffective lmlnrwed pistoneries.

It is important that the movements sf the sliding 'fiSiZOIl-illtti'ifiSshall be es fiir as pessible free 0m frictional hindrsnes in theircontect with the curvilinen 1' ewes If the slots 22, and to this endthem is provided airs of roller-bearings and 25,tl1et are dzspeseri, asshown, in recesses 26.

As the endsof the piston-blades 24 and. 24 are always in sliding contactwit?) the inner Walls of the e 'linder, and therefore subject isfrietinn and wear, and as it is important to minimize leakage at thepoints where the steam receiving and discharging 8 aces are separated bythe sliding pistfm blar es--i lax, at the paints 0f centered, at saidblades with the wells of the eylinderthere is provided pswlv ingstrips27 thst are adapted to fit and fes- .ten themselves within a routedcavity 28,

formed in the and mrtion cf the respective blades, as shewn 1n ig. 4,the outer projecting ends of said strip being snarled to form eknife-edge Contact te obtain a stesnvtight joint with e l'ninimum offlit-tier v In order be held the ends of the rotary drum in steamy tightyielding contact with the been "5 13$ the cylinder, there are provided.the rsspsetivs ends of the rotary drum with ennui nr gmovss 29 withinwhich are fitted and festeasd resihent weenresisting gaskets 30, thetpzsinte the annular channel 31,:iermsrisi i13- inner face of the head 7 andthat scia. tii in selves t0 yieldin 3y Contact with t 9 wells thereof inthree planes.

'32 and 32 designaterssilient peekingstrips that are seated'in thechannel er xesesses and 33, located, respectively, with e 1351 81 andlower inner eripheral wall pert-inns 0f the cylinder, as s own.

To furnish a means by which the steam may be su gnlied to the operatingsteamspaces 19 an 19, there is provided in the up per portions of thecylinder casing or walls a. stesm-admission passage 34, havin braneiles35 and 36, that terminate interiorly in ports 37 and 38, sash of whichis arranged in spam relation tn the adjacent end of the stemn space ordivision with which it is intended in establish communication Thepassages thus formed are covered by the centmli w-iq'mrtured late 39,which is removnhly secured to the (5 indet by serew-lmlts 40.

41 (lesi nntes a steam-supply ipe that is conneeteil with thenpel't'ureel p ate 39 in a manner to-estaiilish sninmunieution with thepassagesilfi end. 36' 7 42 designates a segnmetal-shaped 7 valve that isshdwn as being mounted in n tubular seat termed, respectivelv, by theeum'znvn ahutinents in the removaifle plate 39 and the portion 43 of thecylinder-casing, the said gag alve being lee-s ted at the junctionformed by the eductien end of the supply-pipe 41 In theperipherel'surfiace of the Valve-plug is 'en edmisnon -cayity or Passage-way 44',that 1% ee'neexvo in eress-sestmn. 0n the 0ppesite side of the ssvity=14 is arranged a smaller euxiiisr'y exhaust-cavity 45, which is adaptedtu sli ei'netbiy connect the inactivs mln'iissien 'brenshes, resactively, with the exhaust-(amines 46 46, iin'ined in the walls of thecylinder.

The valve 42 isjprevided with a. stem 47 on the enter snvl 0f which issecured a heli m-s nk at its eutsr sud with a rod 49, lesdin to andivntelly cennecting with an ear or egg preectinn that extends from thewrist-plate d1 sleeve 5i statsbly mounted on the trunnien l6 Tits salve42 is capable of a limited oseilistisn by the movementof the operatinglever handle 52, which grojeets from the "sleeve 51, and when the valveis turned 'to the position shewn in Fig. 3 the steam will ,enter threughthe stench passage 36' and from thence pass tlimugh port 38 to" thesteamiiiqpssits pesition the rlirectien 'sf fi's's i sf'ths stss sii bethrugh tlxebrsssfi3,pnt 3?, sin? tram themes in t5 the s essm spses ii iIn tiie lower thickened wall pcrti'ons of the syiine? there is prqvided.a life system ofad- ;xsissisn of passages and pelts, indicated in theinua ings Fig. 3, as 343,35", 36fand 37" end the latter being covered bya light %Hl(%V&i}l8 plate 39 and connected by a stesmsup iy pipe -11"anti having ali ht c011- trellingwn. v0 42", that is operative yconneeteci, through its stem 47, bell-crank arm 48 red 49, to the sleeveor wrist-plate 51, whereby the said valve may be simultaneuusly actuatedwith its com anion valve 42 to coast alternately with t e brsnsiles 35threte, but wl xich valve is shown in Fig. 3 as being so set as toprovide for an epposing cysic of flow--i s, threugh thepasseges 36' andinto the apposite steam-space. The telvss ii islikewise provided with anexhsust cevity &5, that is adapted t0 coast sl terniliaiy with theexhmxst-eavities 52 and 52* and the serrespnnding inactive steam andmlznissinu lzrsnehes.

Tn fursisiw s n'xeans lay which the steam may be exhausted from thesteam-spaces, tl'wre is revided exhaust-parts 53 54 in the side walls ofthe cylinder to the 1''! lit, to' which are connected, respectively,ranch pipes .55 and .56, that are joined by e cem- Insn exlisusvpipe 57.Arranged within the 'vslvs ssst 58, formed at the junetinn (1f theliens/lies 55 and 56 with the pipe 5?, is a segmental-shaped valve 59,that governs the control 0i": said exhaust-passages and which,

arm 48, which in turn is pivotally connectedsgmee IQ"; wilile if thevalve is website the and the branches 35 skid 36 sf ths'passege 34;. k

and 37 fer intmdueing and setting as steam as shown in Fig. 3, ispositioned to establish communication between the common exhaust-pipe 57and the branch 5b.

Arranged on the opposite side of the cylinder is a like system ofexhaust ports and passages and indicated as 53, 54, 55, and 56, that aregoverned by the valve 59, the latter being shown in a position toestablish an exhaust connection with the branch 51.

The valves 59 and 59 are likewise con nected by their stems 60,bell-crank arms 61, and rods'62 to the cars 50 of the wrist-plate orsleeve 51. i

The exhaust branch pipes 63 63 and 64 64 connect, respectively, withthecavities 46 4c" and 52 52 at one end and to the exhaustpipes 55 55 and56 56 at their opposite ends to provide an auxiliary exhaust system.These auxiliaryexhaust connections cunstitute a'featureofspeoialimportance in an engine of this type, where itis necessary to ob tain aquick and co lete exhaustion.

Having thus descri ed the invention, what I claim is '1. In:a rotarengine, a cylinder having a cross-section 0 ans ual diameter, a rotarypiston concentric Wit in said 0 lindarto provide oppositely-disposed emi steam-spaces between the piston and cy inder, peripheralsteam-admission and steam-exhaust ports for said stamaces, and slidablepiston-blades extending tiirough said rotarypiston and adapted to bemaintained incontact'at their ends with the cylinder-wall, substantiallyas described.

2. Ina rotar engine, a cylinder having a cross-section o unequaldiameter, -a rotary piston concentrically mounted within the same toprovide two oppositely-disposed, equal steam-spaces between @the pistonand cylinder, said cylinder being provided. with two oppositely-disposedsteam admission ports, one foreach stcam'space, andtwooppositely-disposed exhaust-ports, one for each steam space, andslidable piston blades extending through said rotary pistonand arrangedto have their ends normally in contact withthe walls-of the cylinder,substantially as described.

3. In a rotary engine, a cylinder having a cross-section of uncr ualdiameter, a rotary piston concentric within said cylinder to provide twooppositely-disposed er nal steamspaccs between the piston-cylinc or,slidablc piston-blades cxtem ing through the rotary piston and adaptedto have their ends in operative contact with the wall of the cylinder,said cylinder being provided with two sets of oppositely-disposedsteam-admission ports, and two sets of oppositelv-disposed exhaustports,the admission and ex iaust ports of each set communicating with itsrespectivc steannspacc, and means For controllu'ig the said ports -torender one or theother of the set inactive, substantially as described.

sion openings, and means for simultaneously operating said valveswhereby one of can set of said admission-ports can be alternately placedin operative sequence with one of the disc.lnirgeports,,and the (leadadmissionports of each. set can be placed in operative connection withone of the active dischargcopenings, substantially as described.

5. in a rotary engine, a cylinder, a rotary piston therein adapted toprovide two oppo sitely-disposed steam-spaces betwecnthe piston-andcylinder, and piston-blades adapted tocontact with the wall of thecylinder, said cylinder being provided with two sets of admission andexhaust ports for each stcamspace, adapted for alternate operation, saidexhaust-ports of-each steam-space having a valve adapted toaltcrnatelyopen and olose the same, and a secondary exhaust-port for each primaryexhaust-port arranged in successive relation thereto and incommunication therewith, substantially as described.

6. In a rotar engine, a cylinder having a cross-section o unerlualdiameter, a rotary piston concentric wit iin said cylinder to providetwo oppositidy-disposed, er ual steamspacesbetwcen the piston andcylinder, slidable piston-blades extending t irough said piston andadapted to have their endsin op erativc contact withthe walls of thecylinder, said cylinder being provided with steam-admission andsteam-exhaust ports for said steam spaces, and a secondary exhaust-portfor each stcannspace, adapted to rcmaino )en afterthe primary exhausthas been out o by one of the piston-blades, substantially as described.

7. in a rotary engine, a cylinder having a cross-section of mini ualdiameter, a rotary piston conccntric wit iin said cylinder to providetwo oppositely-disposcd, ct nal steamspaccs between the piston-andcvlindcr, slidablc piston-blades extending t rough said piston and adated to be in operative contact at their cud; with thccylinder-wall, saidcylinder being provided with two sets of admission and exhaust ports foreach steamspacc, valves for controlling said port, and a secondaryexhaust-port communicating with each admission-port and controlled bythe valves thereof, substantially as described.

3. In a rotary engine, a cylinder having a crogs-section' of une ualdiameter a. rotary piston concentric: wit in sand cyhn er to providr twooppositely-disposed elfluai steam- SfiELGQS between the piston and cindex slide. 1e piston-blades extending t ough said piston and ada tedto be in operative e0ntact at their an s with the c finder-Wail, saidcylinder being provided wit two sets of admissien and exhaust ports foreach steamspace, 21 Valve for each pair of steamarts cennecting oppositesteam-spaces and a apted to alternately central the same, and means forcnntreiiing said valve to simultaneously throw one set of ports in andthe other out of epezation, substantially as described. 15

In testimony whereof I afix my signature I in presence of twosubscribing witn e sss.

HUB RT I. CALL. Witnesses: I

- -JNO. A. Pmmm, J. E. GRIFFI

